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circulation index

circulation index

[‚sər·kyə·′lā·shən ′in‚deks]
(meteorology)
A measure of the magnitude of one of several aspects of large-scale atmospheric circulation patterns; indices most frequently measured represent the strength of the zonal (east-west) or meridional (north-south) components of the wind, at the surface or at upper levels, usually averaged spatially and often averaged in time.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
2014) indeed possesses useful skill in predicting the circulation index at a range longer than 2 weeks in advance.
Percentile thresholds of the stratospheric mass circulation index and cold area percentage indices derived from NNRI during the 66 DJFs from 1948 to 2014.
Feeling the pulse of the stratosphere: an emerging opportunity for predicting continental-scale cold-air outbreaks 1 month in advance
To the knowledge of the authors it is the first time that the coupling of the synoptic northern hemisphere circulation and the ENSO has been expressed in a convenient coupled circulation index. Hence, although CEDI might be not finally defined, it describes an important feature in the development of extremely hot and dry summers in Central Europe.
Analysis and discussion of atmospheric precursor of European heat summers
The periodical circulation index decreased, after showing no change in September.
Price Movements October 2000
In 1997, the Index of American Public Library Circulation was 116, a 5% increase from the 1996 circulation index of 110.
The adult circulation index increased 2% from 116 in 1996 to 118 in 1997.
Public Library Circulation Increases As Spending Increases
Leonid Klyashtorin of the Russian Federal Institute of Fisheries and Oceanography, it uses the Atmospheric Circulation Index and the Earth Rotational Velocity Index as forecast indices.
The highs and lows of Pacific salmon
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